Mathematics, 07.03.2020 02:13 skyyk7205
A Gallup Poll showed that 30% of Americans are satisfied with the way things are going in the United States (Gallup website, September 12, 2012). Suppose a sample of 20 Ameri- cans is selected as part of a study of the state of the nation.
a. Compute the probability that exactly 4 of the 20 Americans surveyed are satisfied with the way things are going in the United States.
b. Compute the probability that at least 2 of the Americans surveyed are satisfied with satisfied with the way things are going in the United States.
c. For the sample of 20 Americans, compute the expected number of Americans who are number of Americans who are satisfied with the way things are going in the United States.
d. For the sample of 20 Americans, compute the variance and standard deviation of the the way things are going in the United States.
Answers: 3
Mathematics, 21.06.2019 23:00
Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?
Answers: 1
Mathematics, 22.06.2019 00:20
The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?
Answers: 1
Mathematics, 22.06.2019 03:00
Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)
Answers: 3
A Gallup Poll showed that 30% of Americans are satisfied with the way things are going in the United...
Social Studies, 02.04.2020 02:08
Mathematics, 02.04.2020 02:08
Mathematics, 02.04.2020 02:08
Mathematics, 02.04.2020 02:08
Mathematics, 02.04.2020 02:08
Social Studies, 02.04.2020 02:08
History, 02.04.2020 02:08
History, 02.04.2020 02:08
Mathematics, 02.04.2020 02:08
Mathematics, 02.04.2020 02:08